Improved latch



MAHLON J. WOODRUFF, OF N EW BRITAIN, CONNEOTICI, ASSIGNOR T0 RUSSELL AND i thief tocliect an entrance into a hall, whose-door is structed.

.capable of working the latch.

turning by means of a catch, which locks fast that tised; but the two parts are ot unequal size, as seen` "um am t vERNVIN MANUFACTURING COMPANY,V OF SAME PLAGE .Letters Patent No. 97,332, (lated Norenbm 30, 1869.

"m 'IMPRovL-D LATcH.

The Schedule referred to in these Letters Patent and making part of the same m T0 all whom. mail 00m/erm .4, and` D, Figure 5, and in their usual relation with Be it known that I, MAHLON J. WOODRUFF, of each other, at figs. l and 2.

New Britain, ,in the county of Hart-ford, and State of The mortises a, in each, ure respectively of the Connecticut, have invented a new and useful Improvepropel' size to accommodate the portion ofthe spindle ment in Locks and I do hereby declare 'thatthe folwhich they receive, `that in the hub D being too small lowing specification, taken in connection with the to permit'of theentrauce of any part of the spindle B;

From the foregoing, it will be readily seen, that drawings, making a part ot the same, is a full, clear,

with this improved construction, it will be impossible and exact description thereof. i.

This invention relates to the construction of the for-a burglar to eiiect an ent-rance into the house by resorting to the common plan oi removingr the outer swivel-spindle, and hubs used therewith, commonly knob, pushing the spindle clear through the lock,'and

employed in first-class outside door-locks, and is intended to thwart one of the common plans of' the night inserting an instrument, bent at the end, into the inner portion ofthe hub to Work the'latch.

The spindle in this, as in the former method of construction, cannot he pulled outward from the lock, in consequence of the knob upon the inside. l am aware that a structure is described in the "Letters Patent granted to Peter Rodgers, dated September 25, 1840, which prevents the knob-spindle from being pu'shed through the lock from the outside. I do not, therefore, claim broadly all the variations of form and arrangement bywhich u spindle can be constructed so as not vto be able to be pushed through the lock fronlthe outside; but

Whatl claim my in\ention, and desire to ser-.nrc by Letters Patent, isl The combination of a swivel-jointed spindle, wlnise two portions, A and B, are oi' unequal size, wit-h a divided hub, C D, cast separately from the spindle, when such spindle, and hub are arranged in the lock, `so that the former cannot be pushed through' the latter from the outside of the door to which such lock is applied, substantially as herein described.

Witnesses: MAHLON J. VOODRUFF.

A H. E. Rossum., 2d,

(.l. 1t. Pos'r.

protected by alock of this class, as heretofore con- It is wellunderstood that the class oflocks referred to is made with a spindle, in two-parts, united by a swivel-joint. 4

The hub, ofthe lock is4 made iu two parts, as shown at Figure 2,and the wings of' either of the parts are The knob-spindle is so setin the lock that the joint of the swivel shall lic in the planewhieh divides the `two parts yof the hub,'and consequently either portion of the spindle may be used to workthe latch, while the knob attached to the other portion iskept from portion of the hub intowhich it enters.

I propose `to make use of a spindle, made in two parts, and united by a swivel-joint, as heretofore pracat Figures l and 3. The smaller portion, A, is intended to receive the knob placed upon the inside of the door, and the larger portion, B, the outer kno The two parts of the hub arel shown at Figure 

